Ever see Silence of the Lambs? The only trans character is a serial killer. Great movie, but still.
Even in kids movies, the bad guy will sometimes act gay, such as Scar from the Lion King. They can't outright say he's gay, so they just have him act feminine so that the audience will know he's supposed to be the bad guy.
This is so common, there's a full page devoted to it on TV Tropes.
https://tvtropes.org/pmwiki/pmwiki.php/Main/SissyVillain
Even today, the media treads lightly with this subject. There are lots of LGBT characters in comic books, but after over ten years, the MCU still hasn't made a single movie where a main character was LGBT.
If "Cultural Marxists" really controlled Hollywood, the MCU would be full of gay and trans superheroes.